Support: make floating-exception header private
It has only one user. This eliminates the last include of
config.h from the public headers -- ideally, config.h
shouldn't even be installed by `make install` anymore.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133713 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp
index b5fafd6..b64f3b9 100644
--- a/lib/Analysis/ConstantFolding.cpp
+++ b/lib/Analysis/ConstantFolding.cpp
@@ -31,9 +31,10 @@
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/FEnv.h"
#include <cerrno>
#include <cmath>
+
+#include "FEnv.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
diff --git a/lib/Analysis/FEnv.h b/lib/Analysis/FEnv.h
new file mode 100644
index 0000000..c2968fd
--- /dev/null
+++ b/lib/Analysis/FEnv.h
@@ -0,0 +1,56 @@
+//===- FEnv.h - Host floating-point exceptions ------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides an operating system independent interface to
+// floating-point exception interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SYSTEM_FENV_H
+#define LLVM_SYSTEM_FENV_H
+
+#include "llvm/Config/config.h"
+#include <cerrno>
+#ifdef HAVE_FENV_H
+#include <fenv.h>
+#endif
+
+// FIXME: Clang's #include handling apparently doesn't work for libstdc++'s
+// fenv.h; see PR6907 for details.
+#if defined(__clang__) && defined(_GLIBCXX_FENV_H)
+#undef HAVE_FENV_H
+#endif
+
+namespace llvm {
+namespace sys {
+
+/// llvm_fenv_clearexcept - Clear the floating-point exception state.
+static inline void llvm_fenv_clearexcept() {
+#ifdef HAVE_FENV_H
+ feclearexcept(FE_ALL_EXCEPT);
+#endif
+ errno = 0;
+}
+
+/// llvm_fenv_testexcept - Test if a floating-point exception was raised.
+static inline bool llvm_fenv_testexcept() {
+ int errno_val = errno;
+ if (errno_val == ERANGE || errno_val == EDOM)
+ return true;
+#ifdef HAVE_FENV_H
+ if (fetestexcept(FE_ALL_EXCEPT & ~FE_INEXACT))
+ return true;
+#endif
+ return false;
+}
+
+} // End sys namespace
+} // End llvm namespace
+
+#endif